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Mon, 02 Dec 2024 04:03:03 -0800 (PST) Received: from [127.0.1.1] ([193.57.185.11]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434b0d9bed7sm152396095e9.8.2024.12.02.04.03.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Dec 2024 04:03:02 -0800 (PST) From: Bartosz Golaszewski Date: Mon, 02 Dec 2024 13:02:29 +0100 Subject: [PATCH RESEND v7 13/17] ufs: core: add support for deriving the software secret Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241202-wrapped-keys-v7-13-67c3ca3f3282@linaro.org> References: <20241202-wrapped-keys-v7-0-67c3ca3f3282@linaro.org> In-Reply-To: <20241202-wrapped-keys-v7-0-67c3ca3f3282@linaro.org> To: Jens Axboe , Jonathan Corbet , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , Adrian Hunter , Asutosh Das , Ritesh Harjani , Ulf Hansson , Alim Akhtar , Avri Altman , Bart Van Assche , "James E.J. Bottomley" , Gaurav Kashyap , Neil Armstrong , Dmitry Baryshkov , "Martin K. Petersen" , Eric Biggers , "Theodore Y. Ts'o" , Jaegeuk Kim , Alexander Viro , Christian Brauner , Jan Kara , Bjorn Andersson , Konrad Dybcio , Manivannan Sadhasivam Cc: linux-block@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, dm-devel@lists.linux.dev, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Bartosz Golaszewski , Om Prakash Singh X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=2650; i=bartosz.golaszewski@linaro.org; h=from:subject:message-id; bh=MQigyGWoS7egCiFabEGvOIGlVmzO1zHpQlE1Kmp4zmE=; b=owEBbQKS/ZANAwAKARGnLqAUcddyAcsmYgBnTaHVIFBM1y8uWTaoURGUfuIgsk9gDANWKQCsa 8zWklwoa4iJAjMEAAEKAB0WIQQWnetsC8PEYBPSx58Rpy6gFHHXcgUCZ02h1QAKCRARpy6gFHHX cgLDEADBrjGlnEDnOX6YzXmxa3INqU5S9zTFOsYDq/wb2dUpJF462gP2OnwVdwfJVV0cyWufaVS 0/l0ZqTS3zvGBArVt6A1c8blcMiztmUuVjRcwhKHNRnzbf2JIZlGbgd1I7b6YYS1twaziT+9c25 iG3kbnS9u10fc7U4HqOOd+9DpVXJ4uxY3DPvP8W3gh0lJGfxeNmnlXwItZIB0EJ3Zi/0K4lJcg5 cKDNcTr2MQlnc2WZ1G/nsWB2Ar2LoP61yARuh5xaLaD0dAK+iQ4CqDdzazIw+hiko+8Tx9zoxSY cHdvYsWKYYgEnzt8DkEmZH8/QYKXAYxgwL1HP49sIGLwq2NRREAXQCmXXJZ7NihiNinLMQsl5Et pKNVMm/VP27H3ysZv1Es74K+PkL9uC5yzLEHbnElaGefcEfoZW9elsd6PHdxKkZ7HHVPg0CH6Gz EwYJUrlucD2BHHbfFT5OFScj583jzecNIRSnYLsbhT2npxqsG5fhEamL9RaDwexQ/32+qZeaogO Gz7hx9WMoOAy8hfUXGhlKuY8R6kammvqYgztudMdbTxwkPFfipCHbXUr9lXjNVBV6fAoB1KuIAT jLGh8Hk2Aigj6gUSpjqyX5uG+LzT9c1GHeN0XsOW/MxPLokfo/7Eat/kVPMFFdjUuL13y5zqNwx wlUgeZoRfVCAaMw== X-Developer-Key: i=bartosz.golaszewski@linaro.org; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 From: Gaurav Kashyap Extend the UFS core to allow calling the block layer's callback for deriving the software secret from a wrapped key. This is needed as in most cases the wrapped key support will be vendor-specific and the implementation will live in the specific UFS driver. Tested-by: Neil Armstrong Reviewed-by: Om Prakash Singh Signed-off-by: Gaurav Kashyap Reviewed-by: Konrad Dybcio Signed-off-by: Bartosz Golaszewski --- drivers/ufs/core/ufshcd-crypto.c | 15 +++++++++++++++ include/ufs/ufshcd.h | 3 +++ 2 files changed, 18 insertions(+) diff --git a/drivers/ufs/core/ufshcd-crypto.c b/drivers/ufs/core/ufshcd-crypto.c index 64389e8769108..2530239d42afa 100644 --- a/drivers/ufs/core/ufshcd-crypto.c +++ b/drivers/ufs/core/ufshcd-crypto.c @@ -113,6 +113,20 @@ static int ufshcd_crypto_keyslot_evict(struct blk_crypto_profile *profile, return ufshcd_program_key(hba, NULL, &cfg, slot); } +static int ufshcd_crypto_derive_sw_secret(struct blk_crypto_profile *profile, + const u8 wkey[], size_t wkey_size, + u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]) +{ + struct ufs_hba *hba = + container_of(profile, struct ufs_hba, crypto_profile); + + if (hba->vops && hba->vops->derive_sw_secret) + return hba->vops->derive_sw_secret(hba, wkey, wkey_size, + sw_secret); + + return -EOPNOTSUPP; +} + /* * Reprogram the keyslots if needed, and return true if CRYPTO_GENERAL_ENABLE * should be used in the host controller initialization sequence. @@ -134,6 +148,7 @@ bool ufshcd_crypto_enable(struct ufs_hba *hba) static const struct blk_crypto_ll_ops ufshcd_crypto_ops = { .keyslot_program = ufshcd_crypto_keyslot_program, .keyslot_evict = ufshcd_crypto_keyslot_evict, + .derive_sw_secret = ufshcd_crypto_derive_sw_secret, }; static enum blk_crypto_mode_num diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index db2b71f760717..1b7c36e5347b2 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -375,6 +375,9 @@ struct ufs_hba_variant_ops { int (*program_key)(struct ufs_hba *hba, const struct blk_crypto_key *bkey, const union ufs_crypto_cfg_entry *cfg, int slot); + int (*derive_sw_secret)(struct ufs_hba *hba, const u8 wkey[], + unsigned int wkey_size, + u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]); int (*fill_crypto_prdt)(struct ufs_hba *hba, const struct bio_crypt_ctx *crypt_ctx, void *prdt, unsigned int num_segments);